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本文推广使用了求复合工质临界温度的k_(ij)-V_i|V_j曲线及求纯质饱和蒸汽压的公式,并提出用混合热力学函数的方法计算复合工质在汽化过程中的焓变化及熵变化。 一、复合工质的状态图,临界参数和饱和蒸汽压 复合工质的p-T图与T-s图如图1所示。在共沸点上,复合工质的汽化过程与纯质完全相同,如是全共沸复合工质,则整个汽化过程与纯质完全相同。
In this paper, the formula of k_ (ij) -V_i | V_j for calculating the critical temperature of composite working fluid and the formula for calculating the pure saturated vapor pressure are proposed. The enthalpy change of composite working fluid in vaporization process Entropy changes. First, the composite working fluid state diagram, the critical parameters and saturated vapor pressure p-T composite working fluid and T-s diagram shown in Figure 1. At the azeotropic point, the vaporization process of the composite refrigerant is exactly the same as that of the pure refrigerant. In the case of a total azeotropic refrigerant, the entire vaporization process is exactly the same as that of the pure refrigerant.